I installed 2 new o2 sensors bank 1 and bank 2 both pre cat. i had it read previously by a handheld which said Bank 1 and bankk 2 o2 sensors were bad. Afer I installed the semsors I disconnected the battery then after reconnecting after a minute the vehicle was running very rough and stumbling. I was not able to drive the car. I then put back in the old sensors to alleviate this problem but it still ran like crap. I dont know what could be wrong? Besides reinstalling the new o2 sensor what could I do? Need help bad! The car is a Lexus is 300 2001

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Asked by May 20, 2007 at 04:13 PM about the 2001 Lexus IS 300

Question type: Maintenance & Repair

I installed 2 new o2 sensors bank 1 and bank 2 both pre cat.  i had it read previously by a handheld which said Bank 1 and bankk 2 o2 sensors were bad.  Afer I installed the semsors I disconnected the battery then after reconnecting after a minute the vehicle was running very rough and stumbling.  I was not able to drive the car.  I then put back in the old sensors to alleviate this problem but it still ran like crap.  I dont know what could be wrong?  Besides reinstalling the new o2 sensor what could I do?  Need help bad!

1 Answer

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you may have to have the computer reset even though you unplugged the battery

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